Is there an explanation for the prominence of blue-colored wolves, especially werewolves, in fiction?
In media, a large number of wolf characters (werewolves or otherwise) are depicted as blue, ranging from bright blue to a subdued purple - examples include Warwick (League of Legends), Jon Talbain (Darkstalkers), Sabrewulf (Killer Instinct), Tiger (Monster Rancher), and Weregarurumon (Digimon). While unrealistically colored animals are common in fiction, the prominence and consistency of this specific style has made me wonder if there is a historical or heavily-ingrained cultural reason for this.
Why are wolves, especially werewolves, depicted with blue fur? Are there legends or folklore regarding this? Are there real-life species of wolves that are particularly blue in color? Does it relate to their association with the full moon for which they are tied to? Are their old historic records or stories about wolves, fictional or non-fiction, that relate them to the color blue for any reason?